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/*-------------------------------------------------------------------------
*
* path.c
* portable path handling routines
*
* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/port/path.c,v 1.6 2004/05/11 21:57:15 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#include "c.h"
#include <ctype.h>
/*
* is_absolute_path
*/
bool
is_absolute_path(const char *filename)
{
return filename[0] == '/'
#ifdef WIN32 /* WIN32 paths can either have forward or
* backward slashes */
|| filename[0] == '\\'
|| (isalpha(filename[0]) && filename[1] == ':'
&& (filename[2] == '\\' || filename[2] == '/'))
#endif
;
}
/*
* first_path_separator
*/
char *
first_path_separator(const char *filename)
{
#ifndef WIN32
return strchr(filename, '/');
#else
char *slash,
*bslash;
/* How should we handle "C:file.c"? */
slash = strchr(filename, '/');
bslash = strchr(filename, '\\');
if (slash == NULL)
return bslash;
else if (bslash == NULL)
return slash;
else
return (slash < bslash) ? slash : bslash;
#endif
}
/*
* last_path_separator
*/
char *
last_path_separator(const char *filename)
{
#ifndef WIN32
return strrchr(filename, '/');
#else
char *slash,
*bslash;
/* How should we handle "C:file.c"? */
slash = strrchr(filename, '/');
bslash = strrchr(filename, '\\');
if (slash == NULL)
return bslash;
else if (bslash == NULL)
return slash;
else
return (slash > bslash) ? slash : bslash;
#endif
}
/*
* make all paths look like unix, with forward slashes
* also strip any trailing slash.
*
* The Windows command processor will accept suitably quoted paths
* with forward slashes, but barfs badly with mixed forward and back
* slashes. Removing the trailing slash on a path means we never get
* ugly double slashes. Don't remove a leading slash, though.
*/
void
canonicalize_path(char *path)
{
char *p;
for (p = path; *p; p++)
{
#ifdef WIN32
if (*p == '\\')
*p = '/';
#endif
}
if (p > path+1 && *--p == '/')
*p = '\0';
}
/*
* Extracts the actual name of the program as called.
*/
char *
get_progname(char *argv0)
{
if (!last_path_separator(argv0))
return argv0;
else
return last_path_separator(argv0) + 1;
}
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